Compound explosive-engine.



N0. 69!,084. Pate nted Jan. l4, I902.

F. wl TOEDT.

COMPOUND EXPLOSIVE ENGINE.

(Application filed June 27, 1901.)

(No Model.)

[NVE/V TOR W1 T/VESSES:

Attorney THE "mums Pnzas 1:0. PmIo-uma. WASHINGTON. o. c.

FREDERICK IVILLIAM TOEDT, OF HAMBURG, IOWA.

COMPOUND EXPLOSIVE- ENGINE.

SPECIFICATION forming part of Letters Patent No.

691,084, dated January 14, 19022.

Application filed June 27, 1901. Serial No. 66,240. N m l To all whom it may concern:

Be it known that I, FREDERICK \VILLIAM TOEDT, a citizen of the United States, residing at Hamburg, in the county of Fremont and State of Iowa, have invented new and useful Improvements in Compound Explosive-Engines, (for which application for patent in Great Britain was filed June 14, 1901, No. 12,204,) of which the following is a specification.

This invent-ion relates to improvements in compound explosive-engines, the object being to provide an engine of compact construction and one in which when the charge is exploded in the high -pressure cylinder after having driven the piston therein the gas will pass under tension to a low-pressure cylinder and drive its piston, thus utilizing the full force of the charge, the construction of the engine providing for connecting the rods of the pistons to a double-crank shaft, the cran kshaft having means for actuating at a lower rate of speed a trip which moves a lever which is so fulcrumed as to alternately open the exhaust-port and a port leading from the highpressure cylinder to a way which communicates with the low-pressure cylinder.

In an engine constructed in accordance with my invention the charge is first exploded in the high-pressure cylinder and drives its piston beyond a port which opens into a by-pass or way, and thus places the high-pressure cylinder in communication with a low-pressure one,there being provided suitable valves, which are operated by the drivenshaft, as will be hereinafter set forth.

In the drawing I have illustrated my invention by a plan View, which is partly in section, the position of the pistons being shown as they will be after the charge has been exploded and before the stroke has been completed.

The high-pressure cylinder 1 is partially surrounded by a water-chamber, and said cylinder has to one side of the same and ad jacent to the low-pressure cylinder 2 a bypass or way 4, which opens at one end into the cylinder 1 by a port 23, which is overrun by the piston 10 at the completion of its stroke. This way 4 is connected to the cylinder 2 by a port 24, a valved port 5 being located at the opposite end of the cylinder from the port 23,

said port5 beingopened when its valve-stem is actuated by a lever, as will hereinafter more fully appear. The entrance-port 8 for the admission of the explosive mixture to the high-pressure cylinder is closed by a springactuated valve which is drawn off its seat by of the piston 10 away from the movement said entrance-port, and adjacent to the entrance-port are electric igniters of any suit able type, arranged to ignite the explosive charge after it has been drawn into the cylinder and compressed. The piston 10 is pro vided with a rod 11, attached to a slide, to which slide is pivoted a connecting-rod 9, the end of said rod engaging a crank 13 on the main shaft 16. The piston 12 operates in the low-pressure cylinder 2, and said cylinder is open at one end, and the connecting-rod 15 of the piston 12 engages a crank 25, which has a longer throw than the crank 13, with which the connecting-rod 9 of the piston 10 engages. The shaft 16 is journaled in boxes 14, and to said shaft is secured a pinion 17, which meshes with a gear-wheel 18, which is suitably supported, said gear-wheel 18 being twice the diameter of the pinion, and the gearwheel carries a cam or roller 19.

Alongside of the low-pressure cylinder is mounteda bar 20, which is spring-actuated toward the roller 19, and to the other end of this rod is secured one end of a lever 21, fulcrumed upon a suitable support which extends from the frame or cylinders, and this lever is adapted to operate the valve of the upon their seats by spring-pressure, the stem of the valve which operates over the port 5 having a movable cap 55, which is connected thereto by a pin which passes through a slot in the valve-stem, the cap being engaged by exit-port 22 and the port 5, which are held the rock-lever 21 against the action of' the spring, so that the valve will not be moved off of the port 5 until the valve over the exitport 22 has moved upon its seat, it being noted that the inlet-port through the head 7 of the high-pressure cylinder is held closed by a spring and is opened by suction when the piston 10 moves away from said port, the spring being materially weaker than the spring on the stem of the valve which covers the port 5. The valved exit-port 22 is connected by a pipe and communicates with the opening 26 through the cylinder 2, which opening is positioned so that it will be covered by the piston 12 except when said piston is near the limit of its stroke toward the head of the low-pressure cylinder.

In operation the charge is drawn into the high-pressure cylinder by its piston and is then compressed, and after being compressed is exploded and drives the piston beyond the port 23. At this time the valve is permitted to move upon the seat of the exit-port 22, and the other valve of the port 5, after the exit-port has been fully closed, is moved ofi its seatto open the port 5, which permits the gas under high tension to pass into the way 4 and from thence to the low-pressure cylinder, driving its piston toward its open end, and at this time the gas under tension can pass through the port 23 to act upon the opposite side of the high-pressure cylinder and balance the same. piston 10 toward the cylinder-head 7 clears the same of gases, audits next outward stroke draws in a charge, and while said charge is being drawn in the exit-port 22 is open and the low-pressure cylinder is cleared. The next motion or movement compresses the charge, which when compressed is exploded, after which the same operation is repeated. In performing the several movements it will be noted that the trip 20 operates the lever 21 buta single time during two complete revolutions of the shaft.

An engine of this type runs comparatively noiselessly, as the high-pressure piston is balanced after the first power-stroke and the full energy of the explosive charge is utilized, thus insuring economy in operation. The engine is compact, and both cylinders lie parallel and in close proximity one to the other.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-- 1. An explosive-engine having high and low pressure cylinders arranged alongside of one another, a way between the cylinders, a valveless port located at the opposite end of each cylinder, said ports connecting the cylinders with each other through the way, a valved port between the high-pressure cylinder and the way, avalved entrance-portleading to the high-pressure cylinder, a valved exit-port through the head of the low-pressure cylinder and a lever for alternately actuating the valve of the port leading to the way and the valve of the exit-port, substantially as shown.

2. Inacompound explosive-engine,the combination of high and low pressure cylinders The movement of the arranged alongside of each other, a port for admitting gas to the high-pressure cylinder, a way between the cylinders and ports adjacent to the opposite ends of the way, one of said ports being overrun by the high-pressure piston, a port the valve of which is operated to establish communication between the high-pressure cylinder and the way, an exit-port closed when the port just mentioned is opened, a shaft having opposed cranks to which the piston-rods are connected, a pinion which meshes with a gear-wheel having a roller anda valve-tripping mechanism actuated by said roller, substantially as shown.

3. In a compound explosive engineahe combination of a high and a low pressure cylinder arranged side by side, the low-pressure cylinder being opened at one end, a way between the cylinders, a port at one end of the high-pressure cylinder which connects with the way and is overrun by the piston of said cylinder, a port adjacent to the closed end of the low-pressure cylinder, a port at the opposite end of the high-pressure cylinder from the port which is overrun by its piston, which port communicates with a way, a valve-spring actuated in one direction for closing such port, a cap movable on the valve-stem and engaged by the spring, a valved inlet-opening and means for igniting the charge at the same end of the cylinder as the valve between said cylinder and the way, a valved exit-port through the head of the low-pressure cylinder and means for operating the valves alternately against the movement given thereto by the spring, substantially as shown.

4. In a compound explosive-engine the combination of high and low pressure cylinders arranged side by side and connected by a way, the low-pressure cylinder being open at one end, a valved port between the highpressure cylinder and the way, valveless ports between the way and cylinders which ports may be overrun by the pistons, an exitport having a valve which is closed prior to the opening of the valve over the port between the high-pressure cylinder and the way, an opening through the low-pressure cylinder which communicates with the exit-port, substantially as shown and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing-witnesses. FREDERICK WILLIAM TOEDT. Witnesses:

J. 0. KING, J. E. MORGAN. 

